DE102007050794A1 - Adjustment unit for an adjustable suspension of a motor vehicle - Google Patents

Abstract

adjustment (10) for an adjustable suspension of a Motor vehicle, comprising at least one handlebar (12) with a Radträgerseitigen and a body-side connection area (14, 16), wherein the body-side connection area (16) of the handlebar (12), viewed in the handlebar longitudinal direction (1), displaceable is mounted on a body-mounted subframe (22). The invention is characterized by the fact that the body-side connection area (16) of the handlebar (12) via a torsionally soft trained Bearing (18) at one with an actuator (20) operatively connected and on the subframe (22) fixed thrust bearing (24) is mounted, wherein the thrust bearing (24), viewed in the handlebar longitudinal direction (1), soft, having a constant spring characteristic curve, and respectively perpendicular to the handlebar longitudinal direction (1) stiff, a progressive Having spring characteristic course, is formed.

Description

The The invention relates to an adjusting unit for an adjustable Wheel suspension of a motor vehicle according to the Preamble of claim 1.

Regarding the formation of an adjustment for an adjustable Wheel suspension, for example in the form of an active rear axle steering for a motor vehicle, there are various technical solutions. These are both electromechanical and hydraulic systems in use. The prior art are essentially two methods known to adjust a wheel of a suspension adjustable, namely, the handlebar is variable in its handlebar length trained, or the body-side connection area of the handlebar is slidably mounted. The further technical solution the wheel carrier-side connection area of the handlebar too move is less common and will not continue in the present considered.

The Variant to change the handlebar length proves to be disadvantageous, since the necessary actuator mandatory part of the actual handlebar is and therefore extremely heavy, at least 50% to one unsprung masses Wheel suspension counts and to all abound still extremely "shaken" is (very high acceleration the mechatronic components). In addition, there are significant problems as far as the clearance of the actuator to the neighboring components is concerned. By the relatively large-volume design, the handlebar, respectively Actuator naturally assumes here is the actuator difficult or not at all in the available space accommodate.

The Variant the body-side connection area of the handlebar too Move, usually requires a correspondingly expensive trained handlebar storage. This must be due to the required exact guidance and adjustment of the handlebar carefully, d. H. "Machine-building", designed be. There are at least sliding bearings, if not rolling bearings for use. The storage location is thus inevitably expensive.

A generic adjustment for an adjustable suspension of a motor vehicle in which the body-side connection region of the handlebar is adjustable, is from the DE 44 210 96 A1 known. Here, a piston rod of a hydraulic cylinder using a rubber bushing is pivotally attached to the body-side end of a lower suspension arm. The piston rod in turn is mounted within a cylinder body such that it is displaceable in the longitudinal direction of the respective suspension arm. The cylinder body is finally mounted on the body side by means of a rubber holder, whereby the durability, the environmental resistance and the mounting ability of the cylinder assembly is improved. A disadvantage here turns out to be the fact that all lateral forces, which act on the wheel side on the handlebar, pass to the piston rod and thus the actuator, which u. U. conditional premature wear of the actuator.

Of the Invention is based on the object, an adjustment for an adjustable suspension of a motor vehicle according to the specified in the preamble of claim 1 type while avoiding the disadvantages mentioned in such a way that an introduction of force is prevented in the actuator.

These The object is achieved by the characterizing features of claim 1 solved in conjunction with its generic features.

The Subclaims form advantageous developments of Invention.

To The invention comprises the adjusting unit for an adjustable Wheel suspension of a motor vehicle at least one handlebar with a wheel carrier side and a body side Connection area, wherein the body-side connection area the handlebar viewed in the handlebar longitudinal direction displaced is mounted on a body-mounted subframe. According to the invention the body-side connection area of the driver over a torsionally trained bearing on a with an actuator in Operative connection standing and fixed to the subframe thrust bearing stored. The thrust bearing is in the handlebar longitudinal direction considered soft, a constant spring characteristic curve and respectively perpendicular to the handlebar longitudinal direction stiff, a progressive Having spring characteristic curve, formed.

by virtue of the inventive design of the thrust bearing, namely in the adjustment soft with a constant Spring characteristic curve or perpendicular thereto, d. H. in the vertical and transverse directions, hard with a progressive spring characteristic, the handlebars must or the bearing core of the actuator only according to the adjustment kept and pushed if necessary. All forces and moments, which will cause a reaction in the other directions supported in an advantageous manner by the design of the thrust bearing and compensated.

Another advantage is that the thrust bearing only provides a displacement of the handlebar in a substantially horizontal plane. In an advantageous manner, this ensures that an adjustment process has no or only an insignificant change condition of the instantaneous center height.

Preferably the thrust bearing comprises a bearing housing fixed to the subframe, one with the body-side connection area of the handlebar and the actuator in operative connection bearing core, as well as a between the bearing housing and bearing core arranged elastomer body. Here, the bearing core points parallel to the bearing longitudinal direction aligned, a V-shaped cross-sectional area having, first and second bearing core edge areas, which of respectively corresponding to trained first and second bearing housing areas partially included. The elastomeric body is single Lich between the first bearing core edge region and the first bearing housing region and the second bearing core edge region and the second bearing housing region arranged. Advantageously, by this training of the Thrust bearings ensures that in bearing longitudinal direction due to the shear of the elastomer body a relative small displacement force is required, while in high and transverse direction, the roof-shaped design of the bearing core edge region and bearing housing area the desired hardening causes. Adjustment paths of an order of magnitude about +/- 6 mm are due to the shear of the elastomer body readily realizable. Thus, this embodiment of the invention proves especially advantageous if only little adjustment required is, such as for an active driving dynamics Control of a rear axle steering. In addition, this embodiment proves as a simple, effective and cost effective solution.

In Advantageously, the bearing core of the thrust bearing has a spherical Bearing for connecting the actuator on. By the spherical Connection of the actuator to the bearing core of the thrust bearing, is a ensures further decoupling, so on the actuator no disturbing lateral forces can act.

According to one The first embodiment of the invention is the bearing core the thrust bearing plate-shaped. In the plate-shaped trained bearing core is the one through hole having preferably bearings in the form of a rubber-metal bearing, pressed. The body-side connection area of the handlebar is fork-shaped and has two mutually aligned arranged passage openings. The bearing core of the Thrust bearing and the handlebar are arranged to each other, that the fork-shaped connection area of the handlebar the plate-shaped bearing core partially includes and the passage openings in the fork-shaped body-side connection area and the through hole in the bearing of the bearing core in alignment with each other are aligned. About one of the through holes in the fork-shaped body-side connection area of the handlebar and the through hole in the bearing of the bearing core of the Thrust bearing bolt through bolts are the bearing core of the Thrust bearing and the body-side connection area of the handlebar frictionally connected with each other. This embodiment of the invention only requires the training of the handlebar with a fork-shaped end; the known, torsionally soft rubber-metal bearing, which is used in the original handlebar can, in an advantageous manner used in this embodiment.

According to one second embodiment of the invention is the bearing core the Schublagers hollow body-shaped and has two housing in its two mutually aligned arranged passage openings. The body side Connection area of the handlebar is formed eye-shaped. In the eye-shaped body-side connection area this is a through-hole, preferably in turn in the form of a rubber-metal bearing formed bearing pressed. The body-side connection area of the handlebar and the bearing core of the thrust bearing are arranged to each other, that in the eye-shaped trained body-side connection area integrated warehouse the handlebar within the hollow body formed bearing core is positioned and the through holes in the hollow body trained bearing core and the through hole in the bearing of the handlebar are aligned with each other in alignment. The bearing core of the thrust bearing and the body-side connection area of the handlebar are in turn by means of one of the through holes in the hollow body-shaped trained bearing core and the through hole in the bearing of the handlebar durchfassenden bolt positively together connected. This embodiment proves to be special advantageous, since here the handlebar is taken over unchanged can be. Ie. elaborate changes to the handlebar geometry are not required; the original handlebar with its pressed into the handlebar eye Rubber metal bearings can still be used.

Preferably the bolt is formed with eccentric discs. Training of the bolt with eccentric discs proves to be special advantageous because in addition to the active Adjustment by means of the thrust bearing also a static Vorspureinstellung over the eccentric discs is possible.

According to a further advantageous embodiment, the actuator is by means of another spherical bearing mounted on the subframe. Due to the now bilateral spherical bearing of the actuator is advantageously ensured that jamming is prevented when the bearing core of the thrust bearing moves according to its degrees of freedom.

Preferably the handlebar is acting as an approximately in the handlebar longitudinal direction Linear actuator formed. In an advantageous manner, this is a extremely fast and precise handle adjustment possible.

The Bearing housing of the thrust bearing is non-positive, positive or cohesive connected to the subframe.

Further Advantages, features and applications of the present Invention will become apparent from the following description in conjunction with the embodiments shown in the drawing.

The The invention will be described below with reference to the drawings Embodiments described in more detail.

In the description, the claims and in the drawing used in the list of reference numerals given below Terms and associated reference numbers used. In the drawing mean:

1 a rear axle of a motor vehicle in a view obliquely from below with a handlebar according to the prior art and provided for a conversion to an active rear axle steering according to the invention, via a thrust bearing adjustable trained handlebars;

2 an enlarged view of the invention, over the thrust bearing adjustable trained handlebar 1 ;

3 a detailed view of the in 2 illustrated thrust bearing with cutting details;

4 Thrust bearing off 3 on average AA;

5 Thrust bearing off 3 on average BE;

6 Thrust bearing off 3 on average CC;

7 Thrust bearing off 3 on average DD;

8th a schematic representation of another embodiment of the thrust bearing in plan view and in longitudinal section and

9 a schematic sectional view of another embodiment of the thrust bearing.

In The following description and in the figures are to avoid of repetitions same components and components with same Numeral indicated, provided no further differentiation required or useful.

1 shows in a view obliquely from below a rear axle of a motor vehicle. For a changeover to an active rear-axle steering, the link known from the prior art is generally indicated by the reference number 10 to replace designated adjusting unit.

In particular 2 can be seen, includes the adjustment 10 a handlebar 12 with a wheel carrier connection area 14 and a body-side connection area 16 ,

The body-side connection area 16 of the handlebar 12 is about a torsionally soft rubber-metal bearing 18 at one with an actuator 20 in operative connection and on a subframe 22 (see. 1 ) fixed thrust bearing 24 stored. The actuator 20 and the thrust bearing 24 are each by means of screw connections 25 with the subframe 22 non-positively connectable. The bearing of the actuator 20 on the subframe 22 is designed as a spherical bearing.

According to the invention, the thrust bearing 24 considered in the handlebar longitudinal direction l soft, with a constant spring characteristic curve and each perpendicular to the handlebar longitudinal direction l, ie in the vertical and transverse direction, stiff with a progressive spring characteristic curve formed. Ie. the driver 12 or the body-side connection area 16 of the handlebar 12 can from the actuator 20 in the adjustment, ie in the handlebar longitudinal direction l, are moved. All forces and moments, which cause a reaction in the high or transverse direction, are from the thrust bearing 24 supported and compensated.

The detailed design of the thrust bearing 24 is in 3 to 9 shown:
In particular 3 can be seen, has the thrust bearing 24 one on the subframe 22 fixable bearing housing 26 and a storage core 28 on. The storage core 28 of the thrust bearing 24 stands with the body-side connection area 16 of the handlebar 12 and the actuator 20 in active connection.

In this first embodiment, the body-side attachment area is 16 of the handlebar 12 formed fork-shaped and includes or encloses the substantially plate-shaped bearing core 28 of the thrust bearing 24 ,

In particular 4 shows, the bearing core points 28 of the thrust bearing 24 in Lagerlängsrich l aligned, a V-shaped cross-sectional area having, first and second bearing core edge regions 30a . 30b on. The bearing core edge areas 30a . 30b are each of correspondingly designed bearing housing areas 32a . 32b includes. Between the first bearing core edge area 30a and the first bearing housing area 32a and the second storage core edge area 30b and the second bearing housing area 32b is in each case an elastomeric body 34 arranged. Through this roof-shaped design of bearing core 28 and housing 26 of the thrust bearing 24 results in the vertical and transverse direction, the desired hard, progressive bearing characteristic, while in the bearing longitudinal direction l due to the shear of the elastomer body 34 a soft identifier is present.

In particular 5 it can be seen is the determination of the handlebar 12 at the storage core 28 of the drawer 24 the fork-shaped connection area 16 of the handlebar 12 with two through holes arranged in alignment with each other 36 Mistake. The one through hole 38 having rubber-metal bearings 18 is in the plate-shaped bearing core 28 of the thrust bearing 24 pressed. About one of the through holes 36 in the forked connection area 16 of the handlebar 12 and the through hole 38 in the rubber metal bearing 18 of the warehouse core 28 of the thrust bearing 24 through bolt 40 are the storage core 28 of the thrust bearing 24 and the body-side connection area 16 of the handlebar 12 positively connected with each other.

As before 6 and 7 it can be seen, is the the bearing core 28 facing area of the actuator 20 also fork-shaped and by means of a spherical bearing 42 at the storage core 28 of the thrust bearing 24 established. In addition, the bearing housing 26 of the thrust bearing 24 slugs 43 for the frictional connection with the subframe 22 educated.

At the in 8th illustrated embodiment is the bolt 40 with an eccentric 44 connected. This is in addition to the active adjustment of the handlebar 12 over the thrust bearing 24 also a static Vorspureinstellung by means of the eccentric 44 allows.

Another embodiment is in 9 shown. In contrast to the embodiment already described here is the bearing core 28 of the thrust bearing 24 formed hollow body-shaped and the mutually aligned through holes 36 are in the ent speaking housing wall of the hollow body bearing core 28 of the thrust bearing 24 brought in.

The body-side connection area 16 of the handlebar 12 is formed eye-shaped. In the eye-shaped body-side connection area 16 this is a through hole 38 having rubber-metal bearings 18 pressed. The body-side connection area 16 of the handlebar 12 and the storage core 28 of the thrust bearing 24 are in turn arranged to each other, that the through holes 36 in the hollow body-shaped bearing core 28 as well as the through hole 38 in the rubber metal bearing 18 of the handlebar 12 are aligned with each other in alignment.

The storage core 28 of the thrust bearing 24 and the body-side connection area 16 of the handlebar 12 are in turn by means of one of the through holes 36 and the through hole 38 comprehensive bolt 40 positively connected with each other.

This embodiment proves to be particularly advantageous because here the handlebar 12 can be taken over unchanged. Ie. costly changes to the handlebar geometry are not required, and the original handlebar with its pressed into the handlebar eye rubber-metal bearing can be used.

10

adjustment

12

handlebars

14

Radträgerseitiger connecting region

16

body-side connecting region

18

Rubber-metal bearing

20

actuator

22

subframe

24

thrust bearing

25

screw

26

bearing housing

28

bearing core

30a

first Bearing core edge region

30b

second Bearing core edge region

32a

first Bearing housing area

32b

second Bearing housing area

34

elastomer body

36

Through openings

38

Through Hole

40

bolts

42

spherical storage

43

slugs

44

eccentric

l

Handlebar longitudinally

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 4421096 A1 [0005]

Claims (12)

Adjustment unit ( 10 ) for an adjustable suspension of a motor vehicle, comprising at least one handlebar ( 12 ) with a wheel carrier-side and a body-side connection area ( 14 . 16 ), wherein the body-side connection area ( 16 ) of the handlebar ( 12 ) in the longitudinal direction of the handlebar (l) slidably on a body-mounted subframe ( 22 ) is mounted, characterized in that the body-side connection area ( 16 ) of the handlebar ( 12 ) via a torsionally soft bearing ( 18 ) on one with an actuator ( 20 ) in operative connection and on the subframe ( 22 ) thrust bearing ( 24 ), wherein the thrust bearing ( 24 ) seen in the handlebar longitudinal direction (l) soft, a constant spring characteristic curve and each perpendicular to the handlebar longitudinal direction (l) stiff, a progressive spring characteristic course is formed. Adjusting unit according to claim 1, characterized in that the thrust bearing ( 24 ) on the subframe ( 22 ) fixed bearing housing ( 26 ), one with the body-side connection area ( 16 ) of the handlebar ( 12 ) and the actuator ( 20 ) are in active connection bearing core ( 28 ), and between a bearing housing ( 26 ) and storage core ( 28 ) arranged elastomeric body ( 34 ), wherein the bearing core ( 28 ) aligned parallel to the bearing longitudinal direction (l), a V-shaped cross-sectional area having first and second bearing core edge regions ( 30a . 30b ), which in each case by correspondingly formed therefrom first and second bearing housing areas ( 32a . 32b ) are partially included, and that the elastomeric body ( 34 ) only between the first storage core edge region ( 30a ) and the first bearing housing area ( 32a ) as well as the second storage core edge area ( 30b ) and the second bearing housing area ( 32b ) is arranged. Adjusting unit according to claim 2, characterized in that the bearing core ( 28 ) of the thrust bearing ( 24 ) a spherical bearing ( 42 ) for connecting the actuator ( 20 ) having. Adjusting unit according to claims 2 and 3, characterized in that the bearing core ( 28 ) of the thrust bearing ( 24 ) plate-shaped, the one through hole ( 38 ) bearing ( 18 ) is integrally formed, and that the body-side connection area ( 16 ) of the handlebar ( 12 ) bifurcated, through openings ( 36 ) and the plate-shaped bearing core ( 28 ) is partially enclosing, is formed, wherein the bearing core ( 28 ) of the thrust bearing ( 24 ) and the body-side connection area ( 16 ) of the handlebar ( 12 ) by means of one of the passage openings ( 36 ) in the fork-shaped body-side connection area ( 16 ) of the handlebar ( 12 ) and the through-hole ( 38 ) in stock ( 18 ) of the storage core ( 28 ) of the thrust bearing ( 24 ) comprehensive bolt ( 40 ) are positively connected with each other. Adjusting unit according to claim 4, characterized in that the bearing ( 18 ) in the plate-shaped bearing core ( 28 ) of the thrust bearing ( 24 ) is pressed. Adjusting unit according to claims 2 and 3, characterized in that the bearing core ( 28 ) of the thrust bearing ( 24 ) hollow body-shaped, passage openings ( 36 ) is formed, and that the body-side connection area ( 16 ) of the handlebar ( 12 ) eye-shaped, which has a through-bore ( 38 ) bearing ( 18 ) is integrally formed, wherein the eye-shaped body-side connection area ( 16 ) of the handlebar ( 12 ) integrated bearings ( 18 ) within the hollow-body-shaped bearing core ( 28 ) of the thrust bearing ( 24 ) and the bearing core ( 28 ) of the thrust bearing ( 24 ) and the body-side connection area ( 16 ) of the handlebar ( 12 ) by means of one of the passage openings ( 36 ) in the hollow-body-shaped bearing core ( 28 ) of the thrust bearing ( 24 ) and the through-hole ( 38 ) in stock ( 18 ) of the handlebar ( 12 ) comprehensive bolt ( 40 ) are positively connected with each other. Adjusting unit according to claim 6, characterized in that the bearing ( 18 ) in the eye-shaped body-side connection area ( 16 ) of the handlebar ( 12 ) is pressed. Adjusting unit according to claims 4 or 6, characterized in that the bolt ( 40 ) with eccentric discs ( 44 ) is trained. Adjusting unit according to one of the preceding claims, characterized in that the bearing ( 18 ) is formed as a rubber-metal bearing. Adjusting unit according to one of the preceding claims, characterized in that the actuator ( 20 ) by means of a spherical bearing ( 42 ) on the subframe ( 22 ) is stored. Adjusting unit according to one of the preceding claims, characterized in that the actuator ( 20 ) as one approximately in the longitudinal direction (l) of the handlebar ( 12 ) acting linear actuator is formed. Adjusting unit according to one of the preceding claims, characterized in that the bearing housing ( 26 ) of the thrust bearing ( 24 ) with positive or positive or material fit with the subframe ( 22 ) connected is.